<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/Home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card class="box-card">
      <!-- 提示信息 -->
      <el-row>
        <el-alert
          title="添加商品信息"
          type="info"
          show-icon
          center
          :closable="false"
        >
        </el-alert>
      </el-row>
      <el-row class="step">
        <!-- 添加商品进度条 -->
        <el-steps
          :active="activeIndex - 0"
          finish-status="success"
          align-center=""
        >
          <el-step title="基本信息"></el-step>
          <el-step title="商品参数"></el-step>
          <el-step title="商品属性"></el-step>
          <el-step title="商品图片"></el-step>
          <el-step title="商品内容"></el-step>
          <el-step title="完成"></el-step>
        </el-steps>
      </el-row>
      <!-- 添加商品左侧tab栏 -->
      <el-row>
        <el-form
          ref="addFormRef"
          :model="addForm"
          label-width="80px"
          :rules="addFormRules"
          label-position="top"
        >
          <el-tabs
            :tab-position="'left'"
            v-model="activeIndex"
            :before-leave="beforeTableave"
            @tab-click="tabClick"
          >
            <el-tab-pane label="基本信息" name="0">
              <el-form-item label="商品名称" prop="goods_name">
                <el-input v-model="addForm.goods_name"></el-input>
              </el-form-item>
              <el-form-item label="商品价格" prop="goods_price">
                <el-input
                  v-model="addForm.goods_price"
                  type="number"
                ></el-input>
              </el-form-item>
              <el-form-item label="商品重量" prop="goods_weight">
                <el-input
                  v-model="addForm.goods_weight"
                  type="number"
                ></el-input>
              </el-form-item>
              <el-form-item label="商品数量" prop="goods_number">
                <el-input
                  v-model="addForm.goods_number"
                  type="number"
                ></el-input>
              </el-form-item>
              <!-- 商品分类级联选择器 -->
              <el-form-item label="商品分类" prop="goods_cat">
                <el-cascader
                  v-model="addForm.goods_cat"
                  :options="cateList"
                  :props="cateProps"
                  @change="handleChange"
                ></el-cascader>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品参数" name="1">
              <el-form-item
                :label="item.attr_name"
                v-for="item in showList"
                :key="item.attr_id"
              >
                <el-checkbox-group v-model="item.attr_vals">
                  <el-checkbox
                    :label="cb"
                    v-for="(cb, i) in item.attr_vals"
                    :key="i"
                    border
                  ></el-checkbox>
                </el-checkbox-group>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品属性" name="2">
              <el-form-item
                :label="item.attr_name"
                v-for="item in staticList"
                :key="item.attr_id"
              >
                <el-input v-model="item.attr_vals"></el-input>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品图片" name="3">
              <el-upload
                :action="imgUploadUrl"
                :on-preview="handlePreview"
                :on-remove="handleRemove"
                list-type="picture"
                :headers="headeObj"
                :on-success="uploadSuccess"
              >
                <el-button size="small" type="primary">点击上传</el-button>
              </el-upload>
            </el-tab-pane>
            <el-tab-pane label="商品内容" name="4">
              <quill-editor v-model="addForm.goods_introduce"> </quill-editor>
              <el-button class="addShowBtn" type="primary" @click="add"
                >添加商品</el-button
              >
            </el-tab-pane>
          </el-tabs>
        </el-form>
      </el-row>
    </el-card>
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="30%">
      <img :src="previewPath" alt="" />
      <span slot="footer" class="dialog-footer">
        <el-button @click="previewVisible = false">取 消</el-button>
        <el-button type="primary" @click="previewVisible = false"
          >确 定</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>
<script>
// 引入深拷贝插件
import _ from 'lodash'
export default {
  data() {
    return {
      // 提示信息和商品进度条关联属性
      activeIndex: '0',
      // 添加商品表单
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        goods_introduce: '',
        attrs: []
      },
      //   添加商品验证规则
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      //   商品分类数据
      cateList: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
        expandTrigger: 'hover'
      },
      // 动态参数列表数据
      showList: [],
      // 静态参数列表数据
      staticList: [],
      // 图片上传路径
      imgUploadUrl: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 图片上传请求头
      headeObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 图片预览的图片路径数据
      previewPath: [],
      previewVisible: false
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    //   获取商品数据列表
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类信息失败')
      }
      console.log(res.data)
      this.cateList = res.data
    },
    //   商品分类级联选择框change事件
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    // 标签页切换函数
    beforeTableave(activeName, oidActiveName) {
      if (oidActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择分类')
        return false
      }
    },
    // 商品参数tab栏切换发生的事件
    async tabClick() {
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: 'many' } }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取商品参数失败')
        }
        console.log(res)
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.showList = res.data
        console.log(res)
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: 'only' } }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态参数列表失败')
        }
        this.staticList = res.data
      }
    },
    // 图片预览函数
    handlePreview(file) {
      console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 图片删除函数
    handleRemove(file) {
      const filePath = file.response.data.tmp_path
      const i = this.addForm.pics.findIndex((x) => x.pic === filePath)
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm)
    },
    // 监听图片上传成功函数
    uploadSuccess(response) {
      console.log()
      const picInfo = { pic: response.data.tmp_path }
      this.addForm.pics.push(picInfo)
      console.log(this.addForm)
    },
    // 发起添加商品请求
    add() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项')
        }
        // 深拷贝方法_.cloneDeep
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.showList.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态参数
        this.staticList.forEach((item) => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        console.log(form)
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          console.log(res)
          return this.$message.error('添加商品失败')
        }
        this.$router.push('/goods')
        this.$message.success('添加商品成功')
      })
    }
  },
  computed: {
    // 计算属性 计算级联选择框当前选项数组长度
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>
<style lang="less" scoped>
.step {
  margin: 20px 0;
}
.el-checkbox {
  margin: 0 10px 0 0;
}
.addShowBtn {
  margin-top: 20px;
}
</style>
